Cairn

Compaction dead-loop fix: stale reasoning budget handling

NousResearch/hermes-agent · cluster 84371 · agent

Data as of

Nothing open on GitHub. Fix merged in #98998. Check it covers your case.

The short answer

0open issues
0open PRs
6items grouped
Known?
Yes. 6 related items grouped here, 1 issue already closed.
Fix event
A fix was merged to main in PR #98998. Check it covers your case. No release data is tracked.
Tracker
The maintainers' tracker marks this resolved, deciding PR #98998. That is separate from the fix event.
Still open
Nothing open on GitHub.

These issues and PRs address a compaction dead-loop caused by mismatched treatment of stale reasoning tokens—preflight charges them but tail-budget walks exclude them, leading to infinite loops in Codex and Responses API sessions. Fixes involve correctly counting or excluding stale thinking tokens in both preflight and tail-budget calculations.

Open issues0

No open issues.

Open PRs0

No open pull requests.

Fixes on record

Merged to main. A stamp counts the issues a fix is linked to.

  • #98998 fix(compression): compaction dead-loop ended — trigger and tail walks charge stale thinking by wire truth (#84371)

    merged to main

    files: agent/context_compressor.py, agent/conversation_compression.py, agent/conversation_loop.py, agent/message_sanitization.py, agent/model_metadata.py, agent/turn_context.py, tests/agent/test_estimator_parity_84371.py

4 PRs closed without merging

From the close comments: closed without comment 1 · done elsewhere 1 · superseded by another PR 1 · other 1

  • #84398 fix(compression): count stale reasoning in Codex tail budgets · closed without comment
  • #84401 fix(compression): count stale reasoning in Responses API tail budgets · done elsewhere → 64cc87e, #84371, #98998
  • #84433 fix(compression): exclude stale thinking from preflight to prevent dead-loop (#84371) · superseded by another PR
  • #84436 fix(compression): exclude stale thinking from preflight to prevent dead-loop (#84371) · other → #84371
Closed issues · 1
  • Closed#84371Compaction dead-loop: preflight charges full reasoning replay but tail-budget walk excludes it (middle=0 on codex_responses sessions)
How this cluster was grouped
  • Link evidence (structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
  • Pairwise link density 0.33: the share of item pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. 1.00 means every pair is linked.

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At a glance

Subsystem
agent
Merged PRs
#98998
Closed issues
1
Attempts
4 PRs closed without merging
Fix link checked
31 Aug 2026

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The same facts, typed.

cluster/84371.json
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